Which statement best describes the purpose of a master model in the crown workflow?

Which statement best describes the purpose of a master model in the crown workflow?

• A. It stores patient consent forms for future cases.
• B. It records the overall anatomy of the arch for reference during crown fabrication.
• C. It is used as the final prosthesis in some cases.
• D. It is discarded after processing.

Answer: (B)

Master models are precise physical replicas of the patient’s dentition that provide a stable reference for fabricating the crown. They capture the overall anatomy of the arch—the tooth positions, contours, margins, and how the teeth come together—so the technician can accurately design and shape the crown, ensure proper margins, fit against neighboring teeth, and maintain the correct occlusion. This reference is essential during the wax-up, planning, and final fitting stages because it allows you to reproduce the patient’s bite and contact relationships reliably. The master model is not the final prosthesis itself, and it isn’t discarded after processing; it serves as a long-term record of the case and a guide for fabrication.

Master models are precise physical replicas of the patient’s dentition that provide a stable reference for fabricating the crown. They capture the overall anatomy of the arch—the tooth positions, contours, margins, and how the teeth come together—so the technician can accurately design and shape the crown, ensure proper margins, fit against neighboring teeth, and maintain the correct occlusion. This reference is essential during the wax-up, planning, and final fitting stages because it allows you to reproduce the patient’s bite and contact relationships reliably. The master model is not the final prosthesis itself, and it isn’t discarded after processing; it serves as a long-term record of the case and a guide for fabrication.